/Engine/Source/Editor/ContentBrowserData/Public/ContentBrowserDataSource.h
Does not test if internal portion of path exists
None if virtual path prefix of InPath does not exist, Virtual if path exists and is fully virtual (stops before it reaches internal root), Internal if virtual path part of prefix exists and there is text after the virtual prefix
EContentBrowserPathType TryConvertVirtualPath ( const FStringView InPath, [FName](API\Runtime\Core\UObject\FName) & OutPath ) const